Tony,
As others have said, it's been around in the form of the HS2000 for some time now. There are over 600 satisfied owners on
HS2000 & SA/XD Talk.
I've owned the 9mm for close to a year now, and it's one of my favorite pistols. Easy to shoot, low recoil, accurate and reliable. There where a very limited number of pistols that had problems extracting a couple brands of cheap ammo, but most of the pistols have been 100% reliable. Just to be on the safe side, it looks like Springfield had the extractors beefed up on the XD models.
Keep in mind that there are some very closed minded individuals that attack this pistol with a passion. Don't know why they express such a venomous hatred, unless they feel that the XD is a viable threat to their favorite god autos.
I don't shoot Glocks very well, and don't like the grip angle one bit, but I don't come on these boards and call Glocks a POS. I guess these folk are extremely insecure in their firearm choices, and need everyone else to reaffirm their decisions. A great polymer pistol in the $400 range is a threat to their ego. Oh, well, just take their criticism with a grain of salt.
If you shoot the XD, I think you will find out that it really is a great pistol. Take care and good luck.